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| 分布压力 | |||
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pressure of distribution : 25 phrases in 9 subjects |
| Aviation | 1 |
| Bridge construction | 3 |
| Electronics | 2 |
| Engineering geology | 2 |
| Hydroelectric power stations | 2 |
| Metallurgy | 1 |
| Refrigeration | 1 |
| Technology | 12 |
| Wind Energy | 1 |
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